EP 0508366 B1 19970611 - Magnetic head positioning device
Title (en)
Magnetic head positioning device
Title (de)
Aufbau zur Positionierung eines magnetischen Kopfes
Title (fr)
Dispositif pour mettre en position une tête magnétique
Publication
Application
Priority
JP 7981391 A 19910412
Abstract (en)
[origin: EP0508366A2] A servo track (18a, 18b: 18) recorded on a magnetic tape (17) is traced by a pair of servo track reproduce heads (21a, 21b). The output of the pair of servo track reproduce heads are subjected to subtracting process by a subtractor (3). A pulse signal is provided to a stepping motor (7) according to the output of the subtractor (3). The stepping motor (7) provides a rotation in a positive direction or a negative direction according to the applied pulse. The rotation of the stepping motor is transmitted to a magnetic head (9) via a moving mechanism (10, 12, 16) whereby the position of the magnetic head is adjusted along the width direction of the magnetic tape to trace properly the data track (19) on the magnetic tape. A closed-loop control system is implemented for the magnetic head to realize tracking control of high precision. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 5/584 (2006.01)
CPC (source: EP US)
G11B 5/584 (2013.01 - EP US)
Citation (examination)
WO 8901684 A1 19890223 - EASTMAN KODAK CO [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0508366 A2 19921014; EP 0508366 A3 19921223; EP 0508366 B1 19970611; DE 69220280 D1 19970717; DE 69220280 T2 19980122; NO 921434 D0 19920410; NO 921434 L 19921013; US 5311380 A 19940510
DOCDB simple family (application)
EP 92105980 A 19920407; DE 69220280 T 19920407; NO 921434 A 19920410; US 86636992 A 19920410